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ABOUT CLEARSUM

An accountant who understand business,
not just tax returns

ClearSum was founded on a simple idea: business owners deserve an accountant who is responsive, proactive and personally invested in their success.

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Why ClearSum exists

Before starting ClearSum, Harry spent over a decade working in finance, from hands-on accounting roles to Finance Director positions in growing businesses. That experience gave him something most accountants don't have: a commercial perspective on what business owners actually need from their finances.

The same frustration kept coming up at networking events and in conversations with founders. Their accountant never replied. They only heard from them once a year. They had no idea whether their business was performing well or not, and nobody was helping them plan ahead.

ClearSum was built to fix that. A practice where every client gets personal attention, proactive advice and the confidence that comes from knowing their finances are handled properly. No chasing, no surprises, no Sunday-evening tax panics.

Harry and his wife Abi now run ClearSum together. Harry handles the client relationships, advisory and financial strategy, while Abi supports bookkeeping, payroll and the operational side of the practice. It's a genuine partnership, built around the same principle that drives everything ClearSum does: treat every business as if it were their own.

How we work

Accounting should be simple. One fee, everything handled, with a team that knows your business and responds when you need them.

Personal and responsive

You deal directly with us. No call centres, no generic inboxes. When you have a question, you get an answer from someone who knows your business.

All-inclusive, fixed price

Every package covers everything your business needs for one monthly fee. No hidden charges, no hourly rates, no surprises at year end.

Proactive, not reactive

We don't wait until year end to tell you what happened. Quarterly reviews, regular check-ins and early flags on anything that needs attention.

Modern and cloud first

We use Xero and cloud-based tools so you have real-time visibility of your numbers. No paper files, no worrying where you've put your receipts, no waiting for updates.

Professional services expertise

We work specialise in supporting consultants, marketing agencies, HR firms and coaches. We understand your business model and the financial patterns specific to your sector.

Clear, transparent pricing

Our pricing is published on our website because we believe you should know what you're paying before the first conversation. No awkward fee negotiations.

Meet the team

ClearSum is a small, dedicated team. That's deliberate. Every client works directly with us.

Harry Whittington

Founder

CIMA qualified with over a decade of experience spanning hands-on accounting and Finance Director roles. Harry handles all client relationships, advisory and financial strategy. He started ClearSum because he believed business owners deserved better from their accountant.

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Abi Whittington

Operations Manager

Abi joined ClearSum in January 2026 to support the growing practice. She handles bookkeeping, payroll, marketing and the operational side of the business, making sure everything runs smoothly behind the scenes so clients always get a responsive, organised service.

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10+ Years

Experience in finance and accounting

Based in Brighton, working UK-wide

ClearSum is based at Sussex Innovation Centre in Brighton, part of the University of Sussex's business hub. But our cloud-first approach means geography is never a barrier..

We work with professional services businesses across the UK. You get the same personal, responsive service whether you're down the road or on the other side of the country. Everything we do is online, which means real-time access to your numbers and a team that's always reachable.

Want to see if we're the right fit?

Book a free discovery call with Harry.

No pressure, no obligation, just a conversation about your business and how we can help.

Book a free Discovery Call